<template>
  <div class="login_container">
    <div class="login_box">
      <!--  头像区域    -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="">
      </div>
      <!--  登录表单区域 -->
      <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRule" class="login_form">
        <!--用户名-->
        <el-form-item prop="username">
          <el-input  prefix-icon="iconfont icon-user" v-model="loginForm.username"></el-input>
        </el-form-item>
        <!--密码-->
        <el-form-item prop="password">
          <el-input type="password" prefix-icon="iconfont icon-3702mima" v-model="loginForm.password"></el-input>
        </el-form-item>
        <!--按钮区域-->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data(){
    return {
      // 这是登录表单的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 这是表单的验证规则对象
      loginFormRule: {
        // 验证用户名是否合法
        username: [
          { require: true, message: "请输入登录名称", trigger: 'blur'},
          { min: 3, max: 10, message: "长度在 3 到 10 个字符", trigger: 'blur'}
        ],
        // 验证密码是否合法
        password: [
          { require: true, message: "请输入登录名称", trigger: 'blur'},
          { min: 3, max: 10, message: "长度在 3 到 10 个字符", trigger: 'blur'}
        ]
      }
    }
  },
  methods: {
    // 点击重置按钮, 重置登录表单
    resetLoginForm(){
      this.$refs.loginFormRef.resetFields();
    },
    // 登录
    login(){
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return;
        let { data: res } = await this.$http.post('login', this.loginForm);
        if (res.meta.status !== 200) return this.$message.error('登录失败');
        this.$message.success('登录成功')

        // 保存token
        window.sessionStorage.setItem('token', res.data.token);
        // 跳转
        this.$router.push('home');
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container{
  background-color: #2b4b6b;
  height: 100%;
}

.login_box{
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avatar_box{
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;

    img{
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }

  .login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
  }

  .btns{
    display: flex;
    justify-content: flex-end;
  }
}
</style>

